ToriOS Manual v2

I spent a few hours last night (12/1/2018) re-writing the ToriOS manual in LaTeX using Overleaf. This is and important step forward. ToriOS is now based purely on Debian, due to the continuing support for older systems.

This has gone well. Overleaf allows projects to be downloaded the project (zip file) and the pdf document. These are now in the github repository below having been pushed early this morning (well it was 13/1/2019 by the time I was ready to push the latest version).